How much sleep do we need?
This varies greatly from person to person. The amount of sleep needed varies from four hours to over ten hours. It also depends on level of activity. A person who is retired may undertake less activity than when they were working and less sleep is needed. On the other hand, a person with a young family and constantly on the go will require more sleep to recuperate. The amount of sleep needed reduces as we get older. A baby needs 16 to 17 hours sleep; by the age of five, sleep requirement reduces to 8 to 9 hours and teenagers generally need less than 8 hours sleep. Even less sleep is needed as we enter adulthood.